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A291608 as a simple table

na(n)
10
21
33
46
510
618
721
834
944
10105
11154
12163
13189
14382
15421
162473
172664
184590
199804
2019950
2129992
2238457
2340249
24124656
25185139
26195032

[0,1,3,6,10,18,21,34,44,105,154,163,189,382,421,
 2473,2664,4590,9804,19950,29992,38457,40249,
 124656,185139,195032]